ENGLISH ABSTRACT: Chromosome arm 7DL of common wheat carries genes for agronomically important traits such
as leaf rust, stem rust, Russian wheat aphid and eye spot resistance. Some of these genes occur
on introgressed ...

ENGLISH ABSTRACT: In cross pollinated crops, recurrent selection is used to increase the frequency of desirable
alleles by breaking up existing linkage blocks and forming new gene combinations. Despite
promising results ...

The Russian wheat aphid, Diuraphis noxia (Mordvilko), is a serious insect pest of wheat and
barley. It affects the quality and yield of grain by sucking plant sap from the newest growth
whilst toxic substances are injected ...

ENGLISH ABSTRACT: Stripe (yellow) rust of wheat, caused by Puccinia striiformis f.sp. tritici, was first detected as a
single introduction into South Africa in 1996. Two additional pathotypes have since been
identified. ...

ENGLISH ABSTRACT: Haliotis midae is the most important aquaculture species in South Africa, with abalone
farming contributing 80% of the Rand value of the aquaculture industry. Although genetic
research has benefited the ...

ENGLISH ABSTRACT: The detrimental effect of soil salinity on crop production is a growmg problem worldwide
(Tanji, 1990b). The degree to which plants can tolerate high concentrations of salt in their rooting
medium is ...

ENGLISH ABSTRACT: Apple (Malus x domestica Borkh.) is an important horticultural crop worldwide and in the Western
Cape. The income generated from apple and other deciduous fruit production amounts to
approximately 25% ...

ENGLISH ABSTRACT: The five leading abalone producers in South Africa have initiated a genetic enhancement program for Haliotis midae in a collaborative effort to improve economically valuable traits. Several independent ...

ENGLISH ABSTRACT: Iron metabolism disorders comprise the most common disorders in humans. Hereditary
haemochromatosis (HH) is a common condition resulting from inappropriate iron absorption.
The most common form of the ...